function buildRobertsGlycan() {
    var glycan = build(["ROH", "4YB"]);

    glycan.setTail(1, "O4");
    glycan.attach("4YB");

    glycan.setTail(2, "O4");
    glycan.attach("VMB");

    glycan.setTail(3, "O3");
    glycan.attach("YMA");

    glycan.setTail(4, "O2");
    glycan.attach(["4YB", "0VB"]);

    glycan.setTail(4, "O4");
    glycan.attach("0YB");

    glycan.setTail(3, "O6");
    glycan.attach("2MA");

    glycan.setTail(8, "O2");
    glycan.attach(["4YB", "0VB"]);

    return glycan;
}
